The price of crude oil rose after both the United States and Iran said they launched retaliations for earlier attacks or attempted ones.

The talks have dragged on for weeks, and repeated exchanges of strikes in the Gulf region and Israel’s broadening war in Lebanon are further straining the efforts.

The attack stretched from night into day and the boom of explosions reverberated across cities. Officials said that 12 people were killed in Dnipro and six in Kyiv.

Talks brokered by the United States on moving toward a peace accord have ground to a halt as Washington has focused on the conflict in Iran.

The nominal ceasefire between Iran and the U.S. has been repeatedly tested with back-and-forth attacks, even as officials from both countries try to negotiate an end to the war.

The Israeli advance presents a challenge in the emerging deal to extend the Iran war ceasefire as Tehran wants any agreement to end fighting in Lebanon, too.

Russia said on Monday it intended to launch "systematic strikes" on targets in the Ukrainian capital and warned foreigners and diplomats to leave.